Robustness of Per-Survivor Iterative Timing Recovery Against Pattern-Dependent Noise in Perpendicular Recording
نویسنده
چکیده
Per-survivor iterative timing recovery was proposed by Kovintavewat, Barry, Erden, and Kurtas [1] to perform timing recovery, equalization, and errorcorrection decoding jointly. In this paper, we investigate the robustness of this scheme in the situation where the channel is dominated by media jitter noise. We apply the pattern-dependent noisepredictive (PDNP) technique to per-survivor iterative timing recovery. Results indicate that the persurvivor iterative timing recovery with the PDNP technique is more robust than other iterative timing recovery schemes when operating in media noise dominated channel.
منابع مشابه
Timing Recovery in Magnetic Recording Systems
Timing recovery is a crucial component in a magnetic recording channel detector. Conventional timing recovery techniques are sufficient only when operating at high signalto-noise ratio (SNR). However, iterative error-correction codes allow reliable operation at very low SNR, where conventional techniques fail. In this paper, we summarize the timing recovery schemes based on a per-survivor proce...
متن کاملComplexity Reduction of Modified Per-Survivor Iterative Timing Recovery for Partial Response Channels
The problem of timing recovery operating at low signal-to-noise ratio has been recently solved by a modified per-survivor iterative timing recovery (MPS-ITR) proposed in [1], which jointly performs timing recovery, equalization, and error-correction decoding. In practice, this scheme exploits a splitpreamble strategy in conjunction with a per-survivor soft-output Viterbi algorithm equalizer to ...
متن کاملIterative Timing Recovery with the Split-Preamble Strategy for Coded Partial Response Channels
This paper proposes a modified per-survivor iterative timing recovery scheme, which exploits a new split-preamble strategy in conjunction with a per-survivor processing soft-output Viterbi algorithm (PSPSOVA). The conventional split-preamble strategy places a preamble at the beginning of a data sector and uses it to run a phase-locked loop during acquisition to find an initial phase/frequency o...
متن کاملPerformance of Interpolated Timing Recovery in Perpendicular Magnetic Recording Channel
Magnetic recording systems employ conventional VCO-based timing recovery to synchronize the readback signal and the sampler, which is expensive to implement. To get rid of this VCO, a fully digital timing recovery known as interpolated timing recovery (ITR) is utilized. This paper investigates the performance of the ITR architecture in magnetic recording channels with and without error-control ...
متن کاملOn the Capacity of Data-Dependent Autoregressive Noise Channels
Data-dependent autoregressive noise channel models capture the nonlinearities and the first and second order noise statistics of magnetic recording channels. Recently, an iterative Monte Carlo algorithm to compute tight lower bounds on the capacity of intersymbol interference channels was proposed. This algorithm is readily applied to compute capacity lower bounds of data-dependent autoregressi...
متن کامل